Dihydrofurans
    66.
    发明授权
    Dihydrofurans 失效
    二氢呋喃

    公开(公告)号:US4515978A

    公开(公告)日:1985-05-07

    申请号:US503974

    申请日:1983-06-13

    CPC分类号: C07D307/30

    摘要: 2,4,5-Trisubstituted-2,3-dihydrofurans useful as fragrance compounds are provided herein. The compounds of this invention correspond to the general formula ##STR1## wherein R is an ethyl or vinyl group, R.sub.1 is an alkyl group having from 1 to 4 carbon atoms and R.sub.2 is a hydrocarbon radical having from 3 to 10 carbon atoms. The 2,3-dihydrofuran compounds of the present invention are useful components in the preparation and formulation of fragranced cosmetic and toiletry products.

    摘要翻译: 本文提供了可用作香料化合物的2,4,5-三取代-2,3-二氢呋喃。 本发明的化合物对应于通式“IMAGE”,其中R是乙基或乙烯基,R 1是具有1至4个碳原子的烷基,R 2是具有3至10个碳原子的烃基。 本发明的2,3-二氢呋喃化合物是制备和配制香料化妆品和化妆品的有用组分。

    Herbicidal tetrahydrofuran derivatives
    67.
    发明授权
    Herbicidal tetrahydrofuran derivatives 失效
    除草四氢呋喃衍生物

    公开(公告)号:US4400198A

    公开(公告)日:1983-08-23

    申请号:US283704

    申请日:1981-07-16

    摘要: Compounds of the general formula ##STR1## wherein each of R.sup.1 and R.sup.2 independently represents a hydrogen atom or an optionally substituted alkyl, cycloalkyl or aryl group, or R.sup.1 and R.sup.2 together represent an optionally substituted alkylene group;each of X and Y independently represents one of the groups CR.sup.6 R.sup.7, C=O, C=N--Z, CH--NH.sub.2 ##STR2## in which n is 2 or 3;R.sup.6 represents a hydrogen atom, an optionally substituted alkyl or aryl group or a group of formula --OA in which A represents a hydrogen atom, a heterocyclyl group, an acyl group derived from a carboxylic or a substituted carbamic acid, or a group CR.sup.10 R.sup.11 R.sup.12 ;R.sup.7 represents a hydrogen atom or an optionally substituted alkyl or aryl group;Z represents a hydroxy, alkoxy, acyloxy, amino, alkylamino or dialkylamino group;R.sup.3 represents a hydrogen atom or an optionally substituted alkyl group;each of R.sup.4 and R.sup.5 independently represents a hydrogen atom or an optionally substituted alkyl group;each of R.sup.8 and R.sup.9 independently represents a hydrogen atom, an alkyl group or an aryl group;each of R.sup.10 and R.sup.11 independently represents a hydrogen atom or an alkyl group;R.sup.12 represents an alkoxyalkoxy group a heterocyclyl group, an alkoxycarbonyl group, an optionally substituted aryl group, an alkylthio group or a substituted carboxamido group; andAr represents an optionally substituted fully unsaturated ring having 5 or 6 atoms in the ring of which one is a nitrogen atom and the remainder are carbon atoms, or the N-oxide or an acid addition salt thereof, or Ar represents an optionally substituted phenyl group;with the proviso that if both X and Y represent groups CR.sup.6 R.sup.7, at least one substituent R.sup.6 is a group --OA; exhibit useful herbicidal activity.

    摘要翻译: 通式(I)的化合物,其中R 1和R 2各自独立地表示氢原子或任选取代的烷基,环烷基或芳基,或者R 1和R 2一起表示任选取代的亚烷基; X和Y中的每一个独立地表示CR6R7,C = O,C = N-Z,CH-NH2 中的一个,其中n为2或3; R6代表氢原子,任意取代的烷基或芳基或式-AOA的基团,其中A代表氢原子,杂环基,衍生自羧基或取代的氨基甲酸的酰基或基团CR10R11R12; R7表示氢原子或任选取代的烷基或芳基; Z表示羟基,烷氧基,酰氧基,氨基,烷基氨基或二烷基氨基; R3表示氢原子或任选取代的烷基; R 4和R 5各自独立地表示氢原子或任选取代的烷基; R8和R9各自独立地表示氢原子,烷基或芳基; R 10和R 11各自独立地表示氢原子或烷基; R12表示烷氧基烷氧基,杂环基,烷氧基羰基,任选取代的芳基,烷硫基或取代的甲酰氨基; 并且Ar表示在环中具有5或6个原子的任选取代的完全不饱和环,其中一个为氮原子,其余为碳原子,或其N-氧化物或其酸加成盐,或Ar表示任选取代的苯基 组; 条件是如果X和Y都表示基团CR 6 R 7,则至少一个取代基R 6是基团-OA; 表现出有用的除草活性。

    Preparation of 5-(2,2,2-trihaloethyl)-dialkyl-tetrahydrofuran-2-ones
    68.
    发明授权
    Preparation of 5-(2,2,2-trihaloethyl)-dialkyl-tetrahydrofuran-2-ones 失效
    制备5-(2,2,2-三卤代乙基) - 二烷基 - 四氢呋喃-2-酮

    公开(公告)号:US4320062A

    公开(公告)日:1982-03-16

    申请号:US178171

    申请日:1980-08-14

    CPC分类号: C07D307/33 C07D307/30

    摘要: Preparation of 5-(2,2,2-trihaloethyl)-4,4-dialkyl-tetrahydro-furan-2-ones of the formula I ##STR1## where R.sup.1 and R.sup.2 are each alkyl of 1 to 4 carbon atoms and X is halogen, by reacting a carboxylic acid amide of the formula II ##STR2## where R.sup.3 and R.sup.4 are each alkyl of 1 to 4 carbon atoms, aralkyl of 7 to 9 carbon atoms or aryl of 6 to 10 carbon atoms or together with the nitrogen on which they are present as substituents form a 5-membered or 6-membered saturated ring which may contain a second hetero-atom, with a carbon tetrahalide of the formula IIICX.sub.4 (III)to give an iminium salt of the formula IV ##STR3## and subsequently hydrolyzing this iminium salt; and novel iminium salts of the formula IV.

    摘要翻译: 制备式I(I)的5-(2,2,2-三卤代乙基)-4,4-二烷基 - 四氢 - 呋喃-2-酮其中R 1和R 2各自为1至4个碳原子的烷基 并且X是卤素,通过使式II的羧酰胺(II)其中R3和R4各自为1至4个碳原子的烷基,7至9个碳原子的芳烷基或6至10个碳原子的芳基 或与它们作为取代基存在的氮一起形成可含有第二杂原子的5元或6元饱和环与式III CX4(III)的四卤化碳,得到 (IV)并随后水解该亚胺鎓盐; 和式IV的新型亚胺盐。

    (2,2-Disubstituted vinyl).gamma.-butyrolactones
    69.
    发明授权
    (2,2-Disubstituted vinyl).gamma.-butyrolactones 失效
    (2,2-二取代的乙烯基)γ-丁内酯

    公开(公告)号:US4229353A

    公开(公告)日:1980-10-21

    申请号:US26746

    申请日:1979-04-03

    摘要: (2,2-Disubstituted vinyl)-.gamma.-butyrolactones of the formula: ##STR1## in which R.sub.1 and R.sub.2 are hydrogen or C.sub.1 -C.sub.6 alkyl, preferably methyl,R.sub.3 and R.sub.4 are hydrogen, C.sub.1 -C.sub.6 alkyl, preferably methyl, or halogen, or, together with the carbon atom to which they are attached, form a cycloalkyl group, andR.sub.5 is C.sub.1 -C.sub.6 alkyl,are prepared by condensing an epoxide of the formula: ##STR2## with a malonic acid ester of the formula: ##STR3## in a basic medium. The butyrolactones of formula I are valuable intermediates for the synthesis of synthetic pyrethroids having insecticidal activity.

    摘要翻译: 其中R 1和R 2是氢或C 1 -C 6烷基,优选甲基,R 3和R 4是氢,C 1 -C 6烷基,优选甲基的式(II 2 - 二取代的乙烯基)-γ-丁内酯, 或卤素,或者与它们连接的碳原子一起形成环烷基,并且R 5是C 1 -C 6烷基,是通过将下式的环氧化物与下式的丙二酸酯缩合制备的: 公式:在基本介质中。 式I的丁内酯是合成具有杀虫活性的合成拟除虫菊酯的有价值的中间体。

    2,5,5-Trimethyl-3-carbalkoxy-4(.beta.,.beta.-di
halovinyl)-4,5-dihydrofurans
    70.
    发明授权
    2,5,5-Trimethyl-3-carbalkoxy-4(.beta.,.beta.-di halovinyl)-4,5-dihydrofurans 失效
    2,5,5-三甲基-3-烷氧基-4(β,β-二卤乙烯基)-4,5-二氢呋喃

    公开(公告)号:US4198341A

    公开(公告)日:1980-04-15

    申请号:US11027

    申请日:1979-02-09

    IPC分类号: C07D307/30 C07D307/32

    CPC分类号: C07D307/30

    摘要: A method of preparing certain dihalogen vinyl cyclopropane carboxylic acid esters of the formula ##STR1## wherein R is an alkyl moiety and X is chlorine or bromine by exposing a dihalogen vinyl dihydrofuran of the formula ##STR2## to light, e.g., ultraviolet light. Also disclosed is a method for preparing such 2,4,4-trimethyl-3-carbalkoxy-5-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrofurans by reaction of a .beta.-alkoxycrotonic acid ester or 3,3-bisalkoxybutyric acid ester with a 1,1,1-trihalogen-4-methyl-3- or -4-pentene-2-ol in the presence of an acid catalyst. Also disclosed is a method of converting such 2,4,4-trimethyl-3-carbalkoxy-5-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrofuran by thermal rearrangement into 2,5,5-trimethyl-3-carbalkoxy-4-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrofurans. Such 2,4,4- and 2,5,5-trimethyl-3-carbalkoxy-5-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrofurans are new.

    摘要翻译: 一种制备式(Ⅰ)的某些二卤代乙烯基环丙烷羧酸酯的方法,其中R是烷基部分,X是氯或溴,通过将式II的二卤代乙烯基二氢呋喃暴露于例如紫外光 。 还公开了通过β-烷氧基链烯酸酯或3,3-双烷氧基丁酸酯的反应来制备这种2,4,4-三甲基-3-烷氧基-5-(β,β-二卤代乙烯基)-4,5-二氢呋喃的方法 酸酯与1,1,1-三卤代-4-甲基-3-或-4-戊烯-2-醇在酸催化剂存在下反应。 还公开了通过热重排将这种2,4,4-三甲基-3-烷氧基-5-(β,β-二卤代乙烯基)-4,5-二氢呋喃转化成2,5,5-三甲基-3-碳烷氧基 -4-(β,β-二卤代乙烯基)-4,5-二氢呋喃。 这种2,4,4-和2,5,5-三甲基-3-烷氧基-5-(β,β-二卤代乙烯基)-4,5-二氢呋喃是新的。